FILE - This Jan. 16, 2014 file photo shows Keystone High School wrestler Logan Stiner, top, during a match in Sheffield Village, Ohio. A recent autopsy found that the 18-year-old Stiner had a lethal amount of caffeine in his system when he died May 27, 2014. The sudden death of a healthy high school senior has ramped up attention on unregulated caffeine powder and the ease of taking a toxic dose. (AP Photo/The Chronicle Telegram, Steve Manheim)
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